public void testEnumerateAccounts() throws Exception {
   addSomeRecords();
   otpProvider.enumerateAccounts(result);
   MoreAsserts.assertContentsInAnyOrder(
       result, "*****@*****.**", "*****@*****.**", "*****@*****.**");
 }
 public void testEnumerateAccountsNoRecords() throws Exception {
   assertEquals(0, otpProvider.enumerateAccounts(result));
   MoreAsserts.assertEmpty(result);
 }